This line chart visualizes one week of temperature data for multiple cities around the world, sourced from Data Canvas - Sense Your City. Each city is represented by a smoothly curved line, with a color legend on the right helping to identify them. Built with D3 v5, the visualization uses `d3.line` with `curveBasis` to generate the paths, `d3.scaleTime` and `d3.scaleLinear` for the axes, and a custom `colorLegend` module to render the SVG legend.